Update jInbound using 1-click updates from jInbound Dashboard

after you have provided your Download ID, when you navigate on your jInbound dashboard, if there's a new update available you should see a blue system message informing about a new update available on top of the dashboard:

Update jInbound using 1-click updates from the Joomla Extension Manager

jInbound complies with the Joomla 1-Click Updater, make sure that you have added your Download IDs as described above

Update jInbound using Watchful

jInbound complies with Watchful's update manager, make sure that you have entered your download ID to ensure that the update is authorized and you'll be able to use the Watchful Update Manager to remotely update jInbound and all Add-Ons.